Is there any ftp command to resume upload?

I always use the lftp client which has the ability to resume a download that either died midstream or that I want to cancel and later restart.

I usually use the command like so:

$ lftp -e "mirror -c /download/<dir> /local/<dir>" -u user -p <port> ftp.server.com

What else?

This tool's name is a bit misleading, it can handle either FTP or SFTP.

ftp

$ lftp -e "mirror -c /download/<dir> /local/<dir>" -u user ftp://ftp.server.com

sftp

$ lftp -e "mirror -c /download/<dir> /local/<dir>" -u user sftp://sftp.server.com

Mirroring Links

From time to time you might encounter a issue with mirroring directories that contain symlinks, to work around this issue you can add this option to your lftp command:

set ftp:list-options -L

For eg:

$ lftp -e "set ftp:list-options -L; mirror -c /download/<dir> /local/<dir>" \
    -u user ftp://ftp.server.com

References


lftp also has the "reput" command, which does the SIZE and REST for you

lftp user:pass@host/path/to/folder
cd ok, cwd=/path/to/folder  
lftp user@host:/path/to/folder> reput file.ext 
---> TYPE I                                
<--- 200 Type set to I
---> SIZE file.ext
<--- 213 11842837120
---> PASV
<--- 227 Entering Passive Mode (10,211,14,15,220,70).
---- Connecting data socket to (10.211.14.15) port 56390
---- Data connection established
---> ALLO 20769244058
<--- 202 No storage allocation necessary
---> REST 11842837120
<--- 350 Restarting at 11842837120. Send STORE or RETRIEVE to initiate transfer
---> STOR file.ext
<--- 150 Opening BINARY mode data connection for file.ext
`file.ext' at 6756302848 (32%) 31.50M/s eta:7m [Sending data]

To resume a single file upload using the built-in ftp command you will need to know how many bytes of the file you have already sent. This should be accessible by using ls. Then you use the following sequence to restart your upload replacing <#> with the number of bytes already sent and <filename> with the filename you are uploading.

restart <#>
put <filename>

If the server allows it you should receive a message such as the following...

350 Restart position accepted (<#>).
150 Ok to send data.

This will resume your upload.

Tags:

Ftp

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